Which of the following measurements can be made using a multimeter?

A multimeter is a versatile tool commonly used in electronics and electrical work to measure various parameters. The correct answer focuses on the measurement capabilities of a multimeter, which can include voltage and resistance.

Multimeters are explicitly designed to measure direct current (DC) and alternating current (AC) voltages and resistances within circuits. To measure voltage, the multimeter is set to the voltage mode, and probes are placed across the component or circuit of interest. Similarly, when measuring resistance, the multimeter applies a small voltage to the resistor and measures the resulting current to calculate the resistance as per Ohm's law.

While impedance and reactance are important electrical properties, they usually require more specialized equipment, such as an LCR meter. Similarly, measuring signal strength and noise typically involves using a spectrum analyzer or other specialized test equipment.

Thus, the measurement capabilities of a standard multimeter directly support the ability to measure voltage and resistance, making it a fundamental tool for technicians and hobbyists alike.